Measurement of the Xi^+_c Lifetime
CLEO Collaboration: A.H. Mahmood, et al
TL;DR
This paper reports the first collider-based measurement of the Xi^+_c baryon's lifetime, achieving a precision comparable to previous fixed target experiments through analysis of e+e- collision data.
Contribution
It provides the first measurement of the Xi^+_c lifetime from a collider experiment, using a novel dataset and analysis method.
Findings
Xi^+_c lifetime measured as 503 +/- 47 (stat.) +/- 18 (syst.) fs
Measurement precision comparable to fixed target experiments
First collider-based lifetime measurement of Xi^+_c
Abstract
The Xi^+_c lifetime is measured using 9.0 fb^-1 of e+e- annihilation data collected on and just below the Upsilon(4S) resonance with the CLEO II.V detector at CESR. This is the first measurement of the Xi^+_c lifetime from a collider experiment. Using an unbinned maximum likelihood fit, the Xi^+_c lifetime is measured to be 503 +/- 47 (stat.) +/- 18 (syst.) fs. The precision of this measurement is comparable to previous measurements carried out by fixed target experiments with different sources of systematic uncertainties.
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